Furnace



B. w DUNKLEE.

Furnace.

No. 25,729. Patented Oct. 11, 1859.

' WI Tye-585$ m vz/vroz UNITED STATES PATENT OFFICE.

B. WELLS DUNKLEE, OF BOSTON, MASSACHUSETTS.

FURNACE.

Specification of Letters Patent No. 25,729, dated October 11, 1859.

furnace constructed on my plan. Fig. 2 is a vertical and transverse andFig. 3 a vertical and longitudinal section of the same.

The object of my invention is so to construct a furnace, that the heatedair shall be conducted from the hot air chamber to the discharge fiueswithout coming in contact with the open air, or any other coolingsurfaces; and I also increase rather than diminish the quantity of heatin its passage to and until it enters the conducting flues, thuseconomizing the heat, and of course the fuel. I am also enabled toconcentrate the whole power of heat of the furnace into one distinctflue if necessary, by closing any number of the fiues at their lowerend, thus shutting the heat into the hot air chamber, without allowingit to stand in the fiues, as is generally the case. Secondly I amenabled to ventilate several rooms at the same time, more effectuallyand perfectly, than by any other method now in use.

In the drawings A, denotes the fire pot and cone, as provided with athroat B, for the introduction of fuel, and a door 8.

C is the ash pit, and D, the grate.

Surrounding the fire pot A, is a hot air chamber E, communicating withwhich are four or any other desirable number of hot air discharge fluesF, F, F, F, provided with dampers at their lower ends, or where theyconnect with the hot air chamber, as shown in dotted lines in thedrawings in Fig. 3. By means of said dampers I am enabled to exclude theheat from one or more of the said discharge fiues F, and concentrate itinto the remaining pipe or pipes, thereby saving much heat which wouldotherwise be lost by allowing it to stand in the fiues, as would be thecase, were the dampers placed outside the furnace.

Directly over the hot air discharge chamber E, and surrounding the fluesF, is a smoke drum or chamber G, leading directly from the fire pot orcone. In rear of the ash pit is an air inlet II. By means of this inletthe air passes through two large apertures a, a, made in the base of thefurnace, and into the hot air chamber E. By having the hot air'chamberclosed at top by means of the smoke drum, the cold air is prevented fromcoming in direct contact with the flues F. By this means, and by meansof the smoke chamber or drum around the discharge fiues, the heated air,in its passage through the said fiues, is constantly receiving anincrease of heat, until its final entrance into the non conduct-ingmetallic fines or conducting pipes W, which carry it to the apartmentsto be warmed, without circulating in any chamber over the smoke drum, asis usually the case.

Entirely surrounding the hot air chamber and smoke drum and forming aspace Q, around them, and also forming a dome or chamber I, over thesmoke drum, is a nonconducting casing J, at the lower part of which isan air inlet or pipe K, leading from the bottom of one or more rooms tobe ventilated, and extending into said space Q. The air after enteringthe space Q, through the pipe K, becomes heated and rarefied by comingin contact with the casing of the hot air chamber and smoke drum,thereby creating a draft of air from the lower part of the room, and notonly ventilating said room perfectly, but by means of the aircirculating between the outer and inner casings as above described, Iprevent the outer casing from becoming hot, and consequently-fromheating the cellar in which the furnace may be situated.

The air after passing through the space Q and through the space orchamber over the smoke drum, passes into a horizontal pipe or T L. Thesaid pipe or T is furnished with two dampers M, N, one of which viz., M,by being closed, and by opening the other, N, the air having previouslybeen heated as above described, will pass into the room from which itwas originally taken or into any other room into which it may bedesirable to carry it, thereby warming and ventilating the room at thesame time.

By closing the damper N, and opening the damper M, the aforesaid air maybe carried off into a chimney or smoke pipe or flue, for the purpose ofventilating the aforesaid room, when it is not desirable to warm it.

For the purpose of ventilating one or more additional rooms, I carry apipe out from the side, or down, through the floor of.

the room or rooms to be ventilated, and I ing to the furnace, andthrough the space Q, and smoke drum, as shown in Fig. 3, of.

the drawings. By this means the heat from the space Q, and the smokedrum, acting on the pipe or ventiduct S, causes a strong current of airto pass from said room, and becoming heated in its'passage through thespace Q and smoke drum, serves to partially or wholly heat an additionalroom to which it may be carried, or it may be discharged into thechimney or smoke flue.

We now come to the means for ventilating still other additional room orrooms. Surrounding the smoke discharge pipe 25, is another pipe P, whichextends through the space Q, and is joined tightly to the inner casingof the hot air chamber, and from thence it is carried into the chimney.The inner pipe at, is to be extended a short distance from the casing,and so far therefrom as to cause the air passing from a pipe R, leadingdown from the side or floor of a room to be ventilated, to circulatearound it, and between it and the outer pipe P, and to be heated to sucha degree in its passage on to unite with the smoke, as to give it thesame velocity with the smoke in its passage to the chimney, therebycreating a current of air from the said room for the purpose ofventilating it.

For the purpose of warming and ventilating a number of roomssimultaneously, I claim- The general arrangement as above described ofthe space Q, the chamber or dome I the dampers M, and N, and pipe or TL, and the ventilating pipe S, and smoke drum Q, and ventilating pipe P,and smoke pipe 25, and air duct R and series of dampers in fines F inrelation to each other and with respect to the fiues F and hot airchamber E, the Whole being made to operate substantially in manner andfor the purposes as above set forth.

In testimony whereof I have hereunto set my signature.

B. WELLS DUNKLEE.

WVitnesses:

CHARLES C. WIGGIN, WM. E. SMITH.

